Rio Tinto Executive and Leadership Team

June, 2026

Leadership Overview

Rio Tinto has 10 executives leading key functions including operations, technology, finance, and safety.

Driven by a commitment to responsible resource development, Rio Tinto provides essential minerals and metals, supporting global industry and the transition to a low-carbon future through innovation and sustainable growth.

Leadership Roles at Rio Tinto

  • Chief Financial Officer - Oscar Cely
  • Chief Financial Officer, Rio Tinto Minerals - Kayam Slutsky
  • Chief Financial Officer, Aluminium & Lithium - Ulric Adom
  • Chief Financial Officer, Commercial - Will Millsteed
  • Chief Financial Officer, Borates - Kristina Crosher
  • Chief Financial Officer, Company & Secretary & Director - Anil Gambhir
  • Chief Operating Officer - Mqokeleli Gomba
  • Chief Operating Officer - Diavik Diamond Mine - Matthew Breen
  • Mindsets and Behaviors Coach, Rio Tinto Safe Production System, Office of the Chief Operating Officer - Karin Masters
  • Chief Technology Officer - Harald Muller
  • Oscar Cely - Chief Financial Officer

    Oscar Cely, the Chief Financial Officer at Rio Tinto, directs the company's financial strategy, ensuring robust fiscal management and resource allocation. The Chief Financial Officer oversees all financial operations, including budgeting, forecasting, and investment analysis, supporting Rio Tinto's mission to provide essential minerals and metals responsibly. This critical role involves managing financial risks and opportunities, driving sustainable growth, and ensuring the company's financial health to facilitate the transition to a low-carbon world. Oscar Cely's leadership ensures that financial decisions align with the company's long-term objectives and commitment to minimizing environmental impact. By maintaining strong financial discipline, the Chief Financial Officer underpins the company's ability to invest in advanced technologies and operational improvements, thereby securing its market leadership.

    Kayam Slutsky - Chief Financial Officer, Rio Tinto Minerals

    Kayam Slutsky, the Chief Financial Officer, Rio Tinto Minerals at Rio Tinto, leads the financial operations specifically for the minerals division, ensuring profitability and strategic resource deployment. The Chief Financial Officer, Rio Tinto Minerals manages the financial health of this segment, supporting the delivery of essential minerals that underpin various industries. This specialized role involves detailed financial planning, risk assessment, and investment oversight tailored to the unique demands of mineral extraction and processing. Kayam Slutsky's financial acumen is vital for driving sustainable growth within the minerals sector and contributing to Rio Tinto's broader low-carbon transition goals. By optimizing financial performance, the Chief Financial Officer, Rio Tinto Minerals ensures efficient operations and supports the responsible sourcing of materials critical for global development.

    Ulric Adom - Chief Financial Officer, Aluminium & Lithium

    Ulric Adom, the Chief Financial Officer, Aluminium & Lithium at Rio Tinto, spearheads the financial strategy for the Aluminium and Lithium business units, crucial for the low-carbon transition. The Chief Financial Officer, Aluminium & Lithium oversees financial planning, investment, and performance management for these key commodities, ensuring their responsible production and supply. This role is integral to supporting Rio Tinto's commitment to sustainable growth by managing the financial aspects of operations that provide essential materials for renewable energy technologies and infrastructure. Ulric Adom's financial leadership ensures that these divisions operate efficiently, minimize environmental impact, and contribute effectively to the company's overall mission. By driving financial discipline, the Chief Financial Officer, Aluminium & Lithium enables strategic investments in innovation and operational enhancements.

    Will Millsteed - Chief Financial Officer, Commercial

    Will Millsteed, the Chief Financial Officer, Commercial at Rio Tinto, directs the financial strategy for the company's commercial activities, optimizing revenue streams and market engagement. The Chief Financial Officer, Commercial oversees financial planning and analysis related to sales, marketing, and supply chain operations, ensuring the profitable delivery of essential minerals and metals. This position is key to supporting Rio Tinto's mission by aligning financial objectives with market demands and driving sustainable growth. Will Millsteed's financial expertise ensures that commercial ventures contribute effectively to the company's low-carbon transition goals and overall operational efficiency. By managing commercial finances prudently, the Chief Financial Officer, Commercial enhances the company's ability to respond to global market dynamics and maintain its competitive edge.

    Kristina Crosher - Chief Financial Officer, Borates

    Kristina Crosher, the Chief Financial Officer, Borates at Rio Tinto, manages the financial operations for the borates division, a critical component in various industrial applications. The Chief Financial Officer, Borates oversees financial planning, budgeting, and performance analysis, ensuring the profitable and sustainable extraction and supply of borates. This specialized role supports Rio Tinto's mission by providing essential materials while adhering to stringent environmental standards and driving growth. Kristina Crosher's financial leadership ensures that the borates business operates efficiently, minimizes its environmental footprint, and contributes to the company's overall commitment to responsible resource development. By maintaining robust financial oversight, the Chief Financial Officer, Borates enables strategic investments and operational improvements within the division.

    Anil Gambhir - Chief Financial Officer, Company & Secretary & Director

    Anil Gambhir, the Chief Financial Officer, Company & Secretary & Director at Rio Tinto, provides comprehensive financial oversight and corporate governance leadership. The Chief Financial Officer, Company & Secretary & Director manages the company's financial health, ensuring compliance with all regulatory requirements and board directives. This multifaceted role is essential for maintaining transparency and accountability across Rio Tinto's global operations, supporting its mission to deliver essential minerals and metals responsibly. Anil Gambhir's strategic financial management and corporate secretarial duties are critical for driving sustainable growth and facilitating the transition to a low-carbon world. By ensuring sound financial practices and effective governance, the Chief Financial Officer, Company & Secretary & Director upholds the company's integrity and long-term success.

    Mqokeleli Gomba - Chief Operating Officer

    Mqokeleli Gomba, the Chief Operating Officer at Rio Tinto, directs global mining and processing operations, ensuring the safe and efficient extraction of essential minerals and metals. Overseeing day-to-day activities across diverse sites, the Chief Operating Officer drives operational excellence and implements advanced technologies to minimize environmental impact. This leadership role involves optimizing production workflows and managing large-scale resource projects, directly supporting Rio Tinto's mission to deliver materials vital for industry and the low-carbon transition. By focusing on continuous improvement, Mqokeleli Gomba ensures that operational strategies align with the company's commitment to sustainable growth and responsible resource management. The Chief Operating Officer's oversight extends to enhancing safety protocols and fostering a culture of accountability throughout the operational divisions, thereby reinforcing the company's market position and long-term viability.

    Matthew Breen - Chief Operating Officer - Diavik Diamond Mine

    Matthew Breen, the Chief Operating Officer - Diavik Diamond Mine at Rio Tinto, directs all operational activities at the Diavik Diamond Mine, ensuring safe and efficient diamond extraction. The Chief Operating Officer - Diavik Diamond Mine oversees mine planning, production, and processing, adhering to rigorous safety and environmental standards. This specific leadership role is crucial for Rio Tinto's operations in the diamond sector, contributing to the responsible supply of high-value materials. Matthew Breen's focus on operational excellence drives productivity and minimizes the environmental impact of the mine. By implementing advanced mining techniques and fostering a strong safety culture, the Chief Operating Officer - Diavik Diamond Mine ensures the mine's long-term viability and contribution to the company's overall mission.

    Karin Masters - Mindsets and Behaviors Coach, Rio Tinto Safe Production System, Office of the Chief Operating Officer

    Karin Masters, the Mindsets and Behaviors Coach, Rio Tinto Safe Production System, Office of the Chief Operating Officer at Rio Tinto, cultivates a culture of safety and continuous improvement across operational teams. The Mindsets and Behaviors Coach, Rio Tinto Safe Production System, Office of the Chief Operating Officer focuses on enhancing employee engagement and promoting safe working practices, directly supporting the Chief Operating Officer's mandate for operational excellence. This role is vital for embedding the principles of the Rio Tinto Safe Production System, ensuring that safety is paramount in all activities. Karin Masters' expertise in behavioral science helps to foster a proactive safety mindset, minimizing risks and maximizing efficiency in mining and processing operations. By championing positive mindsets, the Mindsets and Behaviors Coach, Rio Tinto Safe Production System, Office of the Chief Operating Officer contributes significantly to Rio Tinto's commitment to responsible resource development and operational integrity.

    Harald Muller - Chief Technology Officer

    Harald Muller, the Chief Technology Officer at Rio Tinto, architects the company's technological vision, driving innovation in mining and materials processing. The Chief Technology Officer champions the adoption of advanced digital solutions and cutting-edge equipment to enhance operational efficiency, safety, and environmental performance across global sites. This strategic position involves identifying and integrating new technologies that support Rio Tinto's commitment to sustainable growth and the low-carbon transition. Harald Muller's leadership ensures that the company leverages its technological capabilities to responsibly deliver the essential minerals and metals the world requires. By fostering a culture of technological advancement, the Chief Technology Officer plays a crucial part in minimizing environmental impact and maximizing resource recovery, thereby solidifying Rio Tinto's position as a forward-thinking industry leader.

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    Frequently Asked Questions Regarding Rio Tinto Top Executives and Leadership Team

    Who leads Rio Tinto?
    Rio Tinto is led by Oscar Cely (Chief Financial Officer), along with executives such as Kayam Slutsky (Chief Financial Officer, Rio Tinto Minerals) and Ulric Adom (Chief Financial Officer, Aluminium & Lithium).
    Who is part of Rio Tinto’s executive team?
    The executive team of Rio Tinto includes leaders such as Oscar Cely (Chief Financial Officer), Kayam Slutsky (Chief Financial Officer, Rio Tinto Minerals), Ulric Adom (Chief Financial Officer, Aluminium & Lithium) and other senior executives.
    How many executives does Rio Tinto have?
    Rio Tinto has 10 executives leading key business areas.
    What roles are included in Rio Tinto’s leadership team?
    The leadership team of Rio Tinto includes roles such as Chief Financial Officer, Chief Financial Officer, Rio Tinto Minerals, Chief Financial Officer, Aluminium & Lithium, Chief Financial Officer, Commercial, Chief Financial Officer, Borates.